Pod install - LoadError - cannot load such file -- kconv

### Description

If you have xcframework and use default rn-bb template for Ruby 3.4.0 you can see this exception on pod install.

https://github.com/CocoaPods/CocoaPods/issues/12805

I add 

gem 'nkf'
gem 'base64'

to Gemfile


### Packages

- [ ] create-react-native-library
- [x] react-native-builder-bob

### Selected options

-

### Link to repro

.

### Environment

default